Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
ChatWhale - Gamify your customer communication and loyalty rewards
Intercom Facebook integration - Read, manage & respond to Facebook messages from Intercom
SendSMS.global - SMS Marketing Platform
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Open Loyalty for Startups - Open source stack for building customer focused products